
| Nominal Size (Basic Screw Diameter) [Note (7)] |
Body Diameter, D [Notes (8) and (9)] |
Head Diameter, A [Notes (10)] |
Head Height, H |
Maximum Chamfer or Radius, C [Note (11)] |
Nominal Hexagon Socket Size, J [Note(12)] |
Minimum Key Engagement, T |
Minimum Wall Thickness, G |
Minimum Chamfer or Radius, K [Note (13)] |
|||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max | Min | Max | Min | Max | Min | ||||||||
| 0 | (0.0600) | 0.0600 | 0.0568 | 0.096 | 0.091 | 0.060 | 0.057 | 0.004 | ... | 0.050 | 0.025 | 0.020 | 0.007 |
| 1 | (0.0730) | 0.0730 | 0.0695 | 0.118 | 0.112 | 0.073 | 0.070 | 0.005 | ¹⁄₁₆ | 0.062 | 0.031 | 0.025 | 0.007 |
| 2 | (0.0860) | 0.0860 | 0.0822 | 0.140 | 0.134 | 0.086 | 0.083 | 0.008 | ⁵⁄₆₄ | 0.078 | 0.038 | 0.029 | 0.007 |
| 3 | (0.0990) | 0.0990 | 0.0949 | 0.161 | 0.154 | 0.099 | 0.095 | 0.008 | ⁵⁄₆₄ | 0.078 | 0.044 | 0.034 | 0.007 |
| 4 | (0.1120) | 0.1120 | 0.1075 | 0.183 | 0.176 | 0.112 | 0.108 | 0.009 | ³⁄₃₂ | 0.094 | 0.051 | 0.038 | 0.008 |
| 5 | (0.1250) | 0.1250 | 0.1202 | 0.205 | 0.198 | 0.125 | 0.121 | 0.012 | ³⁄₃₂ | 0.094 | 0.057 | 0.043 | 0.008 |
| 6 | (0.1380) | 0.1380 | 0.1329 | 0.226 | 0.218 | 0.138 | 0.134 | 0.013 | ⁷⁄₆₄ | 0.109 | 0.064 | 0.047 | 0.008 |
| 8 | (0.1640) | 0.1640 | 0.1585 | 0.270 | 0.262 | 0.164 | 0.159 | 0.014 | ⁹⁄₆₄ | 0.141 | 0.077 | 0.056 | 0.008 |
| 10 | (0.1900) | 0.1900 | 0.1840 | 0.312 | 0.303 | 0.190 | 0.185 | 0.018 | ⁵⁄₃₂ | 0.156 | 0.090 | 0.065 | 0.008 |
| 12 | (0.2160) | 0.2160 | 0.2095 | 0.324 | 0.314 | 0.216 | 0.210 | 0.022 | ⁵⁄₁₂ | 0.156 | 0.103 | 0.082 | 0.010 |
| ¼ | (0.2500) | 0.2500 | 0.2435 | 0.375 | 0.365 | 0.250 | 0.244 | 0.025 | ³⁄₁₆ | 0.188 | 0.120 | 0.095 | 0.010 |
| ⁵⁄₁₆ | (0.3125) | 0.3125 | 0.3053 | 0.469 | 0.457 | 0.312 | 0.306 | 0.033 | ¼ | 0.250 | 0.151 | 0.143 | 0.010 |
| ⅜ | (0.3750) | 0.3750 | 0.3678 | 0.562 | 0.550 | 0.375 | 0.368 | 0.040 | ⁵⁄₁₆ | 0.312 | 0.182 | 0.143 | 0.010 |
| ⁷⁄₁₆ | (0.4375) | 0.4375 | 0.4294 | 0.656 | 0.642 | 0.438 | 0.430 | 0.047 | ⅜ | 0.375 | 0.213 | 0.166 | 0.015 |
| ½ | (0.5000) | 0.5000 | 0.4919 | 0.750 | 0.735 | 0.500 | 0.492 | 0.055 | ⅜ | 0.375 | 0.245 | 0.190 | 0.015 |
| ⁹⁄₁₆ | (0.5718) | 0.5718 | 0.5538 | 0.843 | 0.827 | 0.562 | 0.554 | 0.62 | ⁷⁄₁₆ | 0.437 | 0.276 | 0.214 | 0.015 |
| ⅝ | (0.7180) | 0.7180 | 0.6163 | 0.938 | 0.914 | 0.718 | 0.616 | 0.070 | ½ | 0.500 | 0.307 | 0.238 | 0.015 |
| ¾ | (0.7500) | 0.7500 | 0.7406 | 1.125 | 1.107 | 0.750 | 0.740 | 0.085 | ⅝ | 0.718 | 0.370 | 0.285 | 0.015 |
| ⅞ | (0.8750) | 0.8750 | 0.8647 | 1.312 | 1.291 | 0.875 | 0.864 | 0.100 | ¾ | 0.750 | 0.432 | 0.333 | 0.020 |
| 1 | (1.0000) | 1.0000 | 0.9886 | 1.500 | 1.479 | 1.000 | 0.988 | 0.114 | ¾ | 0.750 | 0.495 | 0.380 | 0.020 |
| 1⅛ | (1.1250) | 1.1250 | 1.1086 | 1.688 | 1.665 | 1.125 | 1.111 | 0.129 | ⅞ | 0.875 | 0.557 | 0.428 | 0.020 |
| 1¼ | (1.2500) | 1.2500 | 1.2336 | 1.875 | 1.852 | 1.250 | 1.236 | 0.144 | ⅞ | 0.875 | 0.620 | 0.475 | 0.020 |
| 1⅜ | (1.3750) | 1.3750 | 1.3568 | 2.062 | 2.038 | 1.375 | 1.360 | 0.160 | 1 | 1.000 | 0.682 | 0.523 | 0.020 |
| 1½ | (1.5000) | 1.5000 | 1.4818 | 2.250 | 2.224 | 1.500 | 1.485 | 0.176 | 1 | 1.000 | 0.745 | 0.570 | 0.020 |
| 1¾ | (1.7500) | 1.7500 | 1.7295 | 2.718 | 2.597 | 1.750 | 1.734 | 0.207 | 1¼ | 1.250 | 0.870 | 0.665 | 0.020 |
| 2 | (2.0000) | 2.0000 | 1.9780 | 3.000 | 2.970 | 2.000 | 1.983 | 0.238 | 1½ | 1.500 | 0.995 | 0.760 | 0.020 |
| 2¼ | 2.2500 | 2.2500 | 2.2280 | 3.375 | 3.344 | 2.250 | 2.232 | 0.269 | 1¾ | 1.750 | 1.120 | 0.855 | 0.036 |
| 2½ | 2.5000 | 2.5000 | 2.4762 | 3.750 | 3.717 | 2.500 | 2.481 | 0.300 | 1¾ | 1.750 | 1.245 | 0.950 | 0.036 |
| 2¾ | (2.7500) | 2.7500 | 2.7262 | 4.125 | 4.090 | 2.750 | 2.730 | 0.332 | 2 | 2.000 | 1.370 | 1.045 | 0.036 |
| 3 | (3.0000) | 3.0000 | 2.9762 | 4.500 | 4.464 | 3.000 | 2.979 | 0.363 | 2¼ | 2.250 | 1.495 | 1.140 | 0.036 |
| 3¼ | 3.2500 | 3.2500 | 3.2262 | 4.875 | 4.837 | 3.250 | 3.228 | 0.394 | 2¼ | 2.250 | 1.620 | 1.235 | 0.036 |
| 3½ | 3.5000 | 3.5000 | 3.4762 | 5.250 | 5.211 | 3.500 | 3.478 | 0.426 | 2¾ | 2.750 | 1.745 | 1.330 | 0.036 |
| 3¾ | 3.7500 | 3.7500 | 3.7262 | 5.718 | 5.584 | 3.750 | 2.727 | 0.458 | 2¾ | 2.750 | 1.870 | 1.425 | 0.036 |
| 4 | (4.0000) | 4.0000 | 3.9762 | 6.000 | 5.958 | 4.000 | 3.976 | 0.489 | 3 | 3.000 | 1.995 | 1.520 | 0.036 |